Add backend support for setting compatibility answers

backend/api/src/app.ts

@@ -12,6 +12,7 @@ import {blockUser, unblockUser} from './block-user'
 import {getCompatibleProfilesHandler} from './compatible-profiles'
 import {createComment} from './create-comment'
 import {createCompatibilityQuestion} from './create-compatibility-question'
+import {setCompatibilityAnswer} from './set-compatibility-answer'
 import {createProfile} from './create-profile'
 import {createUser} from './create-user'
 import {getCompatibilityQuestions} from './get-compatibililty-questions'
@@ -170,6 +171,7 @@ const handlers: { [k in APIPath]: APIHandler<k> } = {
   'create-comment': createComment,
   'hide-comment': hideComment,
   'create-compatibility-question': createCompatibilityQuestion,
+  'set-compatibility-answer': setCompatibilityAnswer,
   'create-vote': createVote,
   'vote': vote,
   'contact': contact,
@@ -188,7 +190,7 @@ const handlers: { [k in APIPath]: APIHandler<k> } = {
   'set-last-online-time': setLastOnlineTime,
   'save-subscription': saveSubscription,
   'create-bookmarked-search': createBookmarkedSearch,
-    'delete-bookmarked-search': deleteBookmarkedSearch,
+  'delete-bookmarked-search': deleteBookmarkedSearch,
 }
 
 Object.entries(handlers).forEach(([path, handler]) => {

backend/api/src/set-compatibility-answer.ts

@@ -0,0 +1,34 @@
+import {APIHandler} from './helpers/endpoint'
+import {createSupabaseDirectClient} from 'shared/supabase/init'
+import {Row} from 'common/supabase/utils'
+
+export const setCompatibilityAnswer: APIHandler<'set-compatibility-answer'> = async (
+  {questionId, multipleChoice, prefChoices, importance, explanation},
+  auth
+) => {
+  const pg = createSupabaseDirectClient()
+
+  const result = await pg.one<Row<'compatibility_answers'>>({
+    text: `
+        INSERT INTO compatibility_answers
+        (creator_id, question_id, multiple_choice, pref_choices, importance, explanation)
+        VALUES ($1, $2, $3, $4, $5, $6)
+        ON CONFLICT (question_id, creator_id)
+            DO UPDATE SET multiple_choice = EXCLUDED.multiple_choice,
+                          pref_choices    = EXCLUDED.pref_choices,
+                          importance      = EXCLUDED.importance,
+                          explanation     = EXCLUDED.explanation
+        RETURNING *
+    `,
+    values: [
+      auth.uid,
+      questionId,
+      multipleChoice,
+      prefChoices,
+      importance,
+      explanation ?? null,
+    ],
+  })
+
+  return result
+}